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Letters Patent No. 82,658, dated September 29, 1868.

IMPRQVEMENT IN GOMPOUNDSAFE-DOOB. HING.

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T0 ALL WHOM IT MAY CONGERN Be it known that I, PHILIP J. STUHLTRAGER, ofPhiladelphia, Pennsylvania, have invented a Compound Hinge forSafe-Doors, lite.; vand Ido hereby declare the following to be a full,clear, and exact description of the same.

My invention consists of a'compound hinge, constructed and applied inthe peculiarman'ner fully described hereafter, for the purpose ofavoiding the necessity of rounding olf or bevelling the outer edges ofsafe and' other' doors.

In order to enable others skilled in the art to make and apply myinvention, I will now proceed to describe its construction andoperation, reference being had to the accompanying drawing, which formsa part of this specication, and in which- 4 Figure 1`is an exterior viewof my improved hinge applied to a safe-door.

Figure 2, a sectionalplan view on the line 1 2, iig. 1.

- Figure 3, the same, showing the dopr'partly opened.'

Figure 4, 'a perspective View, and v Figure 5 a rear View of the hingeas it appears when the door is partly opened.

Similar letters refer to similar parts throughout the several views.

A represents an ordinary fire or burglar-prooi` safe, and B the' doorofthe same. The plates C C C of the hinge are secured to the front ofthe safe, and each plate is provided' with a tubular projection, a,between which fit the tubular projections b b of a plate, D, the jointbeing completed by arod, e, which is riveted at each end, or otherwisesecured in its place, (see fig. 3.)

At the opposite side gf the plate D are other tubular projections, b',between which are recesses for the l reception of the projections,f, cfaplate, E, the latter and the plate being connected by a rod,g.

The third joint of the hinge is rformed by tubular projections, f, ofthe plate E, and7A the projections h of two plate's F F, which aresecured to the door of the safe, the joint bcingcompleted, as in theformer instances, ,byl a single rod, z'.

r When a safe-door is hung upon ordinary single-jointed hinges, itsouter edge, in order to open and close p properly, and yet preserve atight joint, gmust be bevelled or roundedoff on the arc-of a. circledescribed from 'the' centre of the hinge, as indicated by the dottedline ziiuig. 2.

This bevelling of the outer edge necessitates a corresponding bevel orincrease in the thickness of that portion of the safe with which the-outer edge ofthe door has vto coincide when closed. The bolts of thelock on the inside of the outer edge must also be thrown back towardsthe hinge, andtheir resistance to outward strain is consequentlymuchdecreased, whilethe edge of the door itself c'au be more readily cutaway from theoutside'than if it were straight. l

i lBy the use of my compound hinge, however, the operation of which Iwill now proceed to describe, I vam enabled to construct a door of anydesirable' thickness, and having a straight outer edge at right anglesto the face of the door. i t

In fig. 2, the door of' the safe is represented as closed and secured bya lock, H, worked, in the present instance, from the centre of the door,and 'having four bolts, 'iz'z', as shown in iig.

.After unlocking 'the door, it is not :turned directly upon its hinge inthe usual manner, as such motion would be prevented by the straightedges, y y, of the safe, but it is irst drawn directly outwards untilthe door and the various sections of its hinge assume the position shownin g. 3. The door may then be turned, as upon an ordinary hinge, to theposition shown in g. 4, or it maybe opened to a still greater extent.

In closing the door, the operation is merely reversed, the doorbeingfirst turned until opposite the opening in the front of the safe,and then pushed directly inward, the sectious'ot` the hinge adaptingthemselves to the various motions which are given to the door. i

I prefer, for the sake of strength, to hang the door by one continuoushinge, as above described, but'it will he evident that two o1? moreseparate hingesmsy be used, and, if desired, portions of the hinge maybe coucealed, by moulding or otherwise, so as to expose but e small partof the salme.

Although I have described invention as applied to safe-dooie only,itwill be evident that it may be used in other instances, and, for somepurposes, at hingehaving more than three joints may be advantageouslyemployed. i i

I claim as my invention, and desire to secure by Letters Patent- Acompound hinge, constructed and applied substantially as and for thepurpose herein described.

In testimony whereof', I have signed my name to-this specification inthe presence of two subscribing witnesses.

PHILIP J. STUHLTRAGER.

Witnesses:

JOHN WHITE, HARRY SMITH.

